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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-07 13:06:04 -0500 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-12-22 08:21:02 -0500 |
| commit | cec8d0e7f06e08b981e9d61bef267c8c36d536f5 (patch) | |
| tree | 3d1a3e31f78f06c9b3143dff18b4d53e1878b82b | |
| parent | 945626db0961d8388543b2c96b6f16df57947392 (diff) | |
| download | linux-cec8d0e7f06e08b981e9d61bef267c8c36d536f5.tar.bz2 | |
sh: ftrace: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack
The structure of the ret_stack array on the task struct is going to
change, and accessing it directly via the curr_ret_stack index will no
longer give the ret_stack entry that holds the return address. To access
that, architectures must now use ftrace_graph_get_ret_stack() to get the
associated ret_stack that matches the saved return address.
Cc: linux-sh@vger.kernel.org
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | arch/sh/kernel/dumpstack.c | 11 | ||||
| -rw-r--r-- | arch/sh/kernel/dwarf.c | 9 |
2 files changed, 12 insertions, 8 deletions
diff --git a/arch/sh/kernel/dumpstack.c b/arch/sh/kernel/dumpstack.c index b564b1eae4ae..2c2e151bf39e 100644 --- a/arch/sh/kernel/dumpstack.c +++ b/arch/sh/kernel/dumpstack.c @@ -59,17 +59,20 @@ print_ftrace_graph_addr(unsigned long addr, void *data, struct thread_info *tinfo, int *graph) { struct task_struct *task = tinfo->task; + struct ftrace_ret_stack *ret_stack; unsigned long ret_addr; - int index = task->curr_ret_stack; if (addr != (unsigned long)return_to_handler) return; - if (!task->ret_stack || index < *graph) + if (!task->ret_stack) return; - index -= *graph; - ret_addr = task->ret_stack[index].ret; + ret_stack = ftrace_graph_get_ret_stack(task, *graph); + if (!ret_stack) + return; + + ret_addr = ret_stack->ret; ops->address(data, ret_addr, 1); diff --git a/arch/sh/kernel/dwarf.c b/arch/sh/kernel/dwarf.c index bb511e2d9d68..df0fd6efe758 100644 --- a/arch/sh/kernel/dwarf.c +++ b/arch/sh/kernel/dwarf.c @@ -608,17 +608,18 @@ struct dwarf_frame *dwarf_unwind_stack(unsigned long pc, * expected to find the real return address. */ if (pc == (unsigned long)&return_to_handler) { - int index = current->curr_ret_stack; + struct ftrace_ret_stack *ret_stack; + ret_stack = ftrace_graph_get_ret_stack(current, 0); + if (ret_stack) + pc = ret_stack->ret; /* * We currently have no way of tracking how many * return_to_handler()'s we've seen. If there is more * than one patched return address on our stack, * complain loudly. */ - WARN_ON(index > 0); - - pc = current->ret_stack[index].ret; + WARN_ON(ftrace_graph_get_ret_stack(current, 1); } #endif |